Dynamic cone penetrometer technique

Knowledge graph centered on Dynamic cone penetrometer technique with 76 nodes and 248 connections. Top connected: Gothic, Crested Butte, climatological variability, East River, Winter snowpack.

Method synopsis

Direct measurement of soil depth using auger drilling to bedrock contact, validated with cone penetrometer resistance profiles. Distinguishes mobile regolith from weathered bedrock layers.

Synthesized from method descriptions across 7 papers using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — A hybrid data-model approach to map soil thickness in mountain hillslopes (2021), Earth Surface Dynamics. Implementations in other papers (listed below) may differ.

1. Measure soil thickness using auger drilling
   Drilled soil pits using auger to measure depth from surface to bedrock contact. Sampled at regular intervals along each transect, focusing on distinguishing mobile regolith layer from immobile bedrock.
   Quantities: 78 total sampling locations, 54 locations measured with augerDuration: Field sampling campaignConditions: Accessible terrain avoiding steep rocky areas
   Equipment: soil auger, measuring tape
2. Validate measurements with cone penetrometer
   Used dynamic cone penetrometer (CPT) to provide vertical resistance profiles and validate auger measurements. CPT measurements show resistance changes when entering weathered bedrock.
   Quantities: 24 locations measured with CPT for validationDuration: During field sampling campaignConditions: At locations where auger measurements were taken
   Equipment: dynamic cone penetrometer (CPT)

Typical Equipment

• soil auger
• dynamic cone penetrometer (CPT)
• measuring tape

Output Measurements

• soil thickness
• resistance profiles
• bedrock depth

Papers Using This Protocol (7)

Species Studied With This Protocol

Places Where Used